Hose and pipe coupling.



"No. 887,864. PATENTED MAY 19, 1908.

- M. 0. STEBSE.

HOSE AND PIPE COUPLING.

APPLICATION FILED AUG. 29.1907.

WITNESSES.

I UNITED STATES T OFFICE.

MARPUS (ASSIDY SIJ'IICSIG, 0F STEUBENVILLE, OHIO.

HOSE AND PIPE COUPLING.

Specification of Letters Patent.

Patented May 19, 1908.

Application filed August 29, 1907. Serial No. 390,576.

couplings, and the object is to provide a coupling of simpleconstruction in which the parts can be quickly connected and in a mannerto provide a tight joint.

Ordinarily pipe and hose couplings have the. parts connected by ordinaryscrew threads and these requireconsiderable time Y in order to connectand disconnect the parts.

It has been proposed to cut away the threads at two orinore points sothat the sections of the coupling can be slipped together and locked bygiving them a part turn. WVhen ordinary threads are so cut away it isnecessary to have the sections in a given position, otherwise the endsof the threads will abut instead of havinga thread enter a groove.

The object of this invention is to provide a coupling of the characterlast described, namely, one having the threads cut away at two oppositepoints, and so constructed that the parts can be locked, no matter inwhat position the sections may be assembled. This object is accomplishedby providing the inter-locking sections with what are known as doublethreads.

The invention also comprises ball and socket meeting faces on the twopipe sections. In the accompanying drawing, Figure-1 is a longitudinalsection through a pipe coupling constructed according to my invention;Fig. 2 is an end view of the sleeve or collar; Fig. 3 is a similar viewof the cooperating pipe section; Fig. 4 is a side view of the said pipesection; and Figs. 5 and 6 are diagrams illustrating the principle ofthe invention.

The coupling shown comprises two pipe sections 1 and 2, and acooperating sleeve, collar or nut 3. The pipe section 1 is providedwith. a flange 4, which is engaged by a flange 5 on the sleeve 3, whilethe pipe section 2 and sleeve 3 are provided with interengaging threads6. Instead of having these threads continuous they are cut away at twoopposite ends so as to leave upon each of said members two series ofthreads extending about a quarter of the way of the circumference, andwith intermediate spaces of substantially the same length. The segmentsof threads on the sleeve are internal, being indicated at 7, and theblank spaces indicated at 8, Fig. 2, while on the pipe section thethread segments are external, being shown at 10, and the blank spaces at11 in Fig. 3. The threads on the segments 7 and H), in-

stead of being single threads, are what are,

known as double threads, that is, two parallel threads cutsimultaneously, so that each thread has a double pitch, that is, foreach turn around the member it -progressesfor twice the width of thethread. Such threads are well known, and need no explanation.

The sections are coupled by slipping the pipe member 2 into the sleeveor collar 3, the thread segments 10 on the pipe section passing down inthe blank spaces 8 in the sleeve and the thread segments 7 of the sleevepass' 'ing over the blank spaces 11 of the pipe section. The parts arethen given approximately a quarter rotation and are thereby lockedtogteher. By reason oizhaving double threads on these sections, thelocking can be effected no matter in which position the parts areassembled, whereas with single threads the parts could not be lockedunless assembled in a given position. This is explained by the diagramsshown in Figs. 5 and 6. Fig. 5 is intended to illustrate an ordinarysingle thread. We will say that a thread segment extends from the pointa to point I), a blank space from b to 0, another thread segment from cto d, and a blank space from d to a). It is obvious that the threadprogresses one-quarter of a pitch for each quadrant of thecircle, sothat if its pitch at a is said to be zero, at b it would be one-fourthand atc one-half, and at (1 threefourths and at a one, and so on. Thisholds true for the thread on both the pipe section and the sleeve ornut. Consequently, if the sleeve and nut be assembled so that one of thethread segments on the nut has the ends of its threads in position toenter the thread on the pipe section at a, then the parts can be rotatedand locked. If, however, instead of assembling the parts in thisposition, they be assembled one-half turn from this position, then thesame thread segment on the nut will have to enter the thread on the pipesection at position 0. At this position, however, the thread on the pipesection has advanced one-half a pitch, consequently, in-

' end of the thread on the nut, it will ,presen-t and at a two, etc.

\ The result is that the members can be slipped stead of presenting agroove in line with the the 'end of'a thread, and the partscannot berotatedland interlocked. By having double threadsthis is avoided, sinceif at a, (Flg. (i) the itch beconsidered to be zero, at b it 1s onealf,at a one, and at (i one and one-half, Conse uently, the thread hasadvanced one full pitc from a to 0, thus resenting at c, as well as ate,a groove in l ine with the thread on the opposing member.

together in any of the two positions in which they are ca able of goingtogether, and can then be lociied, instead of havingto be assembled inone of these two positions, as with a single thread.

Since the flanges 4 and 5 are liable not to be quite true, and in orderto-insure a tight joint notwithstanding, the meeting faces of the twopipe sections are formed as cup and ball, as shown at 15, Fig. 1. Anyslight irregularity in the flanges, therefore, does not affect theformation of a tight joint at this oint.

hile I have shown standard V shaped threads, it will be understood thatany other form of thread or spiral rib can be used. vAll suchmodifications are intended to be within the terms of the claimshereinafter made.

WhatIcl aimis:'"-- g 1. A cou ling comprising two tubular members an acoupling member, one tubular member and the coupling member being eachprovided with two series of threads extending substantially one-fourthof the circumference, and with intermediate blank spaces of similarlength, the threads on one of said members being external and the otherinternal, and the threads on both of said members being of double pitch.

2. .A coupling comprising two tubular members and a coupling member, thetwo tubular members having ball and socket meeting faces, and onetubular member and the coupling member being each provided with two"sections of threads extending for substantially one-fourth of the cirumference and intermediate blank spaces f substantially. the samelength, the threads on one of said members being external and on theother being internal, and the threads on both of said members being ofdouble pitch.

In testimony whereof, I the sald MARCUS OAssmY STEEsE have hereunto setmy hand.

'CHAs. E, FOWLER,

EBEN D. MooN.

